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/*
* linux/drivers/video/fbcon-hga.c -- Low level frame buffer operations for
* the Hercules graphics adaptor
*
* Created 25 Nov 1999 by Ferenc Bakonyi (fero@drama.obuda.kando.hu)
* Based on fbcon-mfb.c by Geert Uytterhoeven
*
* History:
*
* - Revision 0.1.0 (6 Dec 1999): comment changes
* - First release (25 Nov 1999)
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive for
* more details.
*/
#include <linux/module.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/string.h>
#include <linux/fb.h>
#include <video/fbcon.h>
#include <video/fbcon-hga.h>
#if 0
#define DPRINTK(args...) printk(KERN_DEBUG __FILE__": " ##args)
#else
#define DPRINTK(args...)
#endif
#define HGA_ROWADDR(row) ((row%4)*8192 + (row>>2)*90)
/*
* Hercules monochrome
*/
static inline u8* rowaddr(struct display *p, u_int row)
{
return p->screen_base + HGA_ROWADDR(row);
}
void fbcon_hga_setup(struct display *p)
{
DPRINTK("fbcon_hga_setup: ll:%d\n", (int)p->line_length);
p->next_line = p->line_length;
p->next_plane = 0;
}
void fbcon_hga_bmove(struct display *p, int sy, int sx, int dy, int dx,
int height, int width)
{
u8 *src, *dest;
u_int rows, y1, y2;
#if 0
if (sx == 0 && dx == 0 && width == p->next_line) {
src = p->screen_base+sy*fontheight(p)*width;
dest = p->screen_base+dy*fontheight(p)*width;
fb_memmove(dest, src, height*fontheight(p)*width);
} else
#endif
if (dy <= sy) {
y1 = sy*fontheight(p);
y2 = dy*fontheight(p);
for (rows = height*fontheight(p); rows--; ) {
src = rowaddr(p, y1)+sx;
dest = rowaddr(p, y2)+dx;
fb_memmove(dest, src, width);
y1++;
y2++;
}
} else {
y1 = (sy+height)*fontheight(p)-1;
y2 = (dy+height)*fontheight(p)-1;
for (rows = height*fontheight(p); rows--;) {
src = rowaddr(p, y1)+sx;
dest = rowaddr(p, y2)+dx;
fb_memmove(dest, src, width);
y1--;
y2--;
}
}
}
void fbcon_hga_clear(struct vc_data *conp, struct display *p, int sy, int sx,
int height, int width)
{
u8 *dest;
u_int rows, y;
int inverse = conp ? attr_reverse(p,conp->vc_video_erase_char) : 0;
DPRINTK("fbcon_hga_clear: sx:%d, sy:%d, height:%d, width:%d\n", sx, sy, height, width);
y = sy*fontheight(p);
#if 0
if (sx == 0 && width == p->next_line) {
if (inverse) {
fb_memset255(dest, height*fontheight(p)*width);
} else {
fb_memclear(dest, height*fontheight(p)*width);
}
} else
#endif
for (rows = height*fontheight(p); rows--; y++) {
dest = rowaddr(p, y)+sx;
if (inverse) {
fb_memset255(dest, width);
} else {
fb_memclear(dest, width);
}
}
}
void fbcon_hga_putc(struct vc_data *conp, struct display *p, int c, int yy,
int xx)
{
u8 *dest, *cdat;
u_int rows, y, bold, revs, underl;
u8 d;
cdat = p->fontdata+(c&p->charmask)*fontheight(p);
bold = attr_bold(p, c);
revs = attr_reverse(p, c);
underl = attr_underline(p, c);
y = yy*fontheight(p);
for (rows = fontheight(p); rows--; y++) {
d = *cdat++;
if (underl && !rows)
d = 0xff;
else if (bold)
d |= d>>1;
if (revs)
d = ~d;
dest = rowaddr(p, y)+xx;
*dest = d;
}
}
void fbcon_hga_putcs(struct vc_data *conp, struct display *p,
const unsigned short *s, int count, int yy, int xx)
{
u8 *dest, *cdat;
u_int rows, y, y0, bold, revs, underl;
u8 d;
u16 c;
bold = attr_bold(p,scr_readw(s));
revs = attr_reverse(p,scr_readw(s));
underl = attr_underline(p,scr_readw(s));
y0 = yy*fontheight(p);
while (count--) {
c = scr_readw(s++) & p->charmask;
cdat = p->fontdata+c*fontheight(p);
y = y0;
for (rows = fontheight(p); rows--; y++) {
d = *cdat++;
if (underl && !rows)
d = 0xff;
else if (bold)
d |= d>>1;
if (revs)
d = ~d;
dest = rowaddr(p, y)+xx;
*dest = d;
}
xx++;
}
}
void fbcon_hga_revc(struct display *p, int xx, int yy)
{
u8 *dest;
u_int rows, y;
y = yy*fontheight(p);
for (rows = fontheight(p); rows--; y++) {
dest = rowaddr(p, y)+xx;
*dest = ~*dest;
}
}
void fbcon_hga_clear_margins(struct vc_data *conp, struct display *p,
int bottom_only)
{
u8 *dest;
u_int height, y;
int inverse = conp ? attr_reverse(p,conp->vc_video_erase_char) : 0;
DPRINTK("fbcon_hga_clear_margins: enter\n");
/* No need to handle right margin. */
y = conp->vc_rows * fontheight(p);
for (height = p->var.yres - y; height-- > 0; y++) {
DPRINTK("fbcon_hga_clear_margins: y:%d, height:%d\n", y, height);
dest = rowaddr(p, y);
if (inverse) {
fb_memset255(dest, p->next_line);
} else {
fb_memclear(dest, p->next_line);
}
}
}
/*
* `switch' for the low level operations
*/
struct display_switch fbcon_hga = {
fbcon_hga_setup, fbcon_hga_bmove, fbcon_hga_clear, fbcon_hga_putc,
fbcon_hga_putcs, fbcon_hga_revc, NULL, NULL, fbcon_hga_clear_margins,
FONTWIDTH(8)
};
#ifdef MODULE
int init_module(void)
{
return 0;
}
void cleanup_module(void)
{
}
#endif /* MODULE */
/*
* Visible symbols for modules
*/
EXPORT_SYMBOL(fbcon_hga);
EXPORT_SYMBOL(fbcon_hga_setup);
EXPORT_SYMBOL(fbcon_hga_bmove);
EXPORT_SYMBOL(fbcon_hga_clear);
EXPORT_SYMBOL(fbcon_hga_putc);
EXPORT_SYMBOL(fbcon_hga_putcs);
EXPORT_SYMBOL(fbcon_hga_revc);
EXPORT_SYMBOL(fbcon_hga_clear_margins);
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